Site about the fight against domestic insects

In detail about linen lice, features of their life and potential danger

Поговорим о бельевых вшах, их особенностях жизни и потенциальной опасности для человека

Linen lice in the people called a louse (Pediculus humanus corporis) - a subspecies of the widely known human lice. In a separate subspecies, the louse was singled out for the reason that in about 72 thousand years of cohabitation with a man she adapted to inhabiting not on the scalp, which is characteristic of a simple human louse, but on clothes with which a person does not part for almost all of its civilized history. At the same time, for such a relatively small evolutionary period, lingerie lice managed to develop adaptations in the structure of their bodies that make life easier for them in clothing, and they can not practically live on a person's head.

On the photo below - linen lice on clothes:

Популяция бельевых вшей на одежде

Linen these lice are called because most people they live on underwear - it's easier and faster to get to the body as a source of food.

It is interesting

In rare cases, when one person is infected with both head and linen lice (this happens mostly in vagrants), they practically do not meet or cross each other on the human body. In the laboratory, when combined, these parasites produce fertile offspring, which indicates their biological affinity.

Here are a few photos of underwear lice:

На фото - бельевая вошь крупным планом

Бельевая вошь на одежде

Хитиновые покровы бельевых вшей полупрозрачные, при достаточном увеличении можно рассмотреть внутренности насекомого

The linen louse is rather whimsical to the conditions of the environment and is dependent on the lifestyle of a person. Knowing its main features, it is quite possible even without the use of poisonous means to bring out linen lice in a rather short time.

How to look like lingerie: photos and videos

Linen lice look the same as the head lice: they are small insects with a body length of about 2-3 mm, without wings, with a long belly. When closely examining the edges of the abdomen, lice can be seen a small border of peculiar folds - they are formed when the insect's stomach is released from the previous portion of food and the abdomen shrinks slightly, wrinkles.

The photo shows a louse under a microscope:

Бельевая вошь под микроскопом

Еще одна фотография бельевой вши под микроскопом

From head lice, the outwardly lingerie is distinguished by the lighter color of the abdomen - they are almost white. After saturation due to the presence of blood in the digestive tract, the louse becomes red or brown. Such a drop of blood in the stomach of a louse can be seen in photographs.

На фото видна капля крови внутри бельевой вши

Сытая бельевая вошь

Larvae of underwear lice look the same as adult insects, but somewhat smaller in size.

The photo below shows a whole small colony of lice on clothes:

Взрослая бельевая вошь и ее личинки

Nits of laundry lice are practically not different from nits of head lice. However, they are found in completely different places - the female lays them between the seams of clothing, in folds, pockets, on the folds, where the person does not reach the egg. To find a nidus without a magnifying glass or a portable microscope is almost impossible: it has a length of about half a millimeter, and it is very difficult to make out it on the linen.

Below the photographs show the nits of underwear lice on clothes:

Скопление гнид бельевых вшей на одежде

At a casual meeting on clothes linen louses look like small small insects with characteristic powerful paws in anterior part of body.

On a note

A characteristic feature on which lice can be identified on clothes is their desire to stay in groups. Alone, they can meet on the body, in convenient places they are usually gathered on linen for several individuals.

Below in the photo you can see how linen lice look like in this group:

Скопление бельевых вшей на одежде иногда бывает не так-то просто рассмотреть

Where do lingerie live and what do they eat?

Most of the time, lingerie lice are carried on clothes. Here they rest, mate and lay eggs. Only for feeding they move to the skin of a person. Lice on the underwear, lice are almost directly near the body, and therefore such "voyages" do not represent a problem for them.

The only food of linen lice is human blood. For sucking, they pierce the skin with styloid-like outgrowths in the mouth and inject into the wound enzymes that reduce blood coagulability.

Стилетоподобными выростами во рту вши прокалывают кожу

Бельевая вошь под электронным микроскопом

On a note

It is the enzymes of the saliva of lice that cause allergic reactions to parasites in some people. And the majority of bites due to these enzymes in places bites appear bluish spots.

Linen lice can survive in a fairly wide temperature range. Adult lice retain viability at temperatures from 0 ° C to + 45 ° C, and nymphs from +5 ° C to + 40 ° C. The optimum temperature for the reproduction of lice is 31-32 ° C. If clothes are removed from time to time and it cools, insects may experience short physical activity slowdowns.

Linen lice like moist air. At low humidity, they die already at a temperature below + 5 ° C and above + 40 ° C.

The adult louse lives about 32-46 days. At low temperatures, the life cycle of the parasites is stretched, and the lice grow smaller.

Each linen louse feeds 4-5 times a day, at a time drinking about a half-milligram of blood.

Каждая вошь во время кормления высасывает не так много крови, но при большом количестве паразитов и массовых укусах такие потери крови могут быть существенными

It is interesting

Lice crawl at a speed of about 15-30 cm per minute. If there are a lot of them on linen and a man, they can get away from him on the bed and furniture.

Bites of lingerie lice are most often found on the upper hairless part of the trunk, as well as on the buttocks and hips. In the groin, linen lice bite rarely, and on the head - almost never. Because of such localization of bites of linen lice, they are often confused with bites of bed bugs.

In the photo - bites of lice in a person:

Укусы бельевых вшей в бедренной области

Most often lice dwell on the clothes of vagabonds and people who do not change their underwear for months. So under the clothes are created the ideal conditions for the reproduction of parasites.

In this case, one-time laundry does not destroy lice - they can survive in the water for two days. But even with a regular change of linen lice can infect a wardrobe and bite a person as far as possible. To reproduce in this case they will be slower, but they will not perish if the infected things are worn by a person at least once every few days.

On bed linens and in pillows, lice do not settle. Meetings with them here - a rare accident (so there are no parasites like bed lice , but there are bed bugs, small larvae of which sometimes mistakenly confused with lice).

What distinguishes laundry lice from other human parasites

Linen lice are easy to distinguish from other parasites:

  • From fleas they differ in light color and inability to jump. In addition, the fleas rarely bite under the clothes.
  • From bugs themselves lice are much smaller in size and light color. In addition, bedbugs bite a person only at night, lice also pester him the whole day while he is dressed.
  • From mites lice can be distinguished by light color and coloniality - mites are rarely found in groups. In addition, the ticks have 8 legs, and their lice have only 6.

На фотографии показана личинка постельного клопа

У клеща 8 лапок, а вот у бельевой вши их всего 6

From head lice, it's quite difficult to distinguish a dressed woman in practice. But the pubic louse is very different: this parasite has a short and wide abdomen, reminiscent of a whole microscopic crab (see photo):

Лобковая вошь по внешнему виду похожа на микроскопического краба

Diseases that carry linen lice

Clothes (or linen) lice are the most dangerous among all their relatives. Feminine pediculosis is characterized by numerous lesions of the trunk, more frequent and acute allergic reactions, a greater incidence of complications in the form of ulcers and pyoderma. In many respects this is due to the fact that louse-heads are most often found in vagrants who do not take any measures to get rid of them and improve their physical condition, strongly run the pediculosis itself and more often infect the combs with infections.

Наиболее часто бельевые вши встречаются у бродяг на улице

By themselves, the bites of parasites cause severe itching and often lead to allergic rashes throughout the body. According to some observations, in children they cause mood changes and constant irritability.

Укусы бельевых вшей могут сопровождаться аллергическими высыпаниями

Linen lice most often among the other types of lice tolerates the pathogens of typhus - swollen and recurrent - as well as Volyn fever. It is because of her death that soldiers died during both world wars, and it is she who spreads these diseases today among the people of Asia and Africa.

Reproduction of underwear lice

Linen louse refers to insects with incomplete transformation: its larvae are similar to adults and differ only in the size and underdevelopment of the reproductive system. Such larvae are called nymphs, they also feed on human blood.

На фото - нимфа бельевой вши

Female lice live 35-45 days, male - slightly less. During its life, the female lays from 100 to 140 eggs, about 3-4 eggs per day (they are called nits). The incubation period of lice eggs at a constant stay near the human body at a temperature of about 32 ° C is about 5 days. If clothes are removed, then on cooling the development of eggs stops and resumes when the next heating. So the development of the egg can last up to 2 months.

After leaving the egg, the larva once sucks blood, fades and turns into a first-generation nymph. Its development lasts 5-6 days, after which the next molt occurs, the next molt takes place after another 8-9 days, and after the third molt the nymph becomes an adult insect.

Взрослая бельевая вошь

Under optimal conditions, the insect undergoes a cycle from egg to egg in 16 days. For two months the number of parasites on clothes can increase hundreds of times.

How do linen lice spread and what should I do not to pick them up?

Linen lice are transmitted from person to person in several ways:

  • With physical contact - hugs, kisses - in clothes.
  • In crowded places - in the crowd, public transport, children's groups, moving from one person's clothes to another's clothes.
  • When sharing clothes - a louse can stay on the body and then move to an unshackled shirt or shirt.
  • When storing clothes together - lice move from one thing to another. This is dangerous spontaneous second-hand, on which things are not processed.
  • Very rarely - on the water. Linen lice can survive in water for up to 2 days and in the pool or in a natural reservoir can move from an infected person to a healthy one.

На стихийных бельевых рынках могут попадаться вещи, не прошедшие санобработку

To prevent infection with linen lice should avoid places where there can be declassed personalities, carefully store clothes, be attentive in public transport. And most importantly - stay away from people who are clearly not observing the rules of hygiene.

To the record "Details about linen lice, the features of their life and potential danger" left 4 comments.
  1. Christina :

    Hello! A week ago my mother came to visit me, she slept with me and my son. I was scratching all night, my son ran away to sleep with his father for the first time in his life. From that day it became difficult to sleep in this bed. The child runs away, I itch already not only in bed, but also during the day. There are no bites on the body, no matter how I looked, there are no insects visible. Just a sharp tingling, like a needle, more often in the area of ​​the ribs and legs. Everywhere they write that the bedbugs are big, lice, too. Maybe it's the larvae yet? Tell me, what kind of this can be and how to deal with it?

    • Elena :

      Cristina, did you find out the reason for your scabies? I have the same symptoms. Insects are not visible, but I walk with red spots, as from a mosquito bite.

  2. Victor :

    Scabies, most likely.

  3. Oksana :

    Maybe a clothes lingerie!

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